Portion of an insole



FIG. 1 is a perspective view of a portion of an insole showing our new design;

FIG. 2 is an enlarged perspective view of an encircled portion, FIG. 2 in FIG. 1;

FIG. 3 is an enlarged cross sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is an enlarged perspective view of an encircled portion, FIG. 4 in FIG. 1;

FIG. 5 is an enlarged cross sectional view taken along line 5-5 in FIG. 1;

FIG. 6 is a bottom view of FIG. 1;

FIG. 7 is a side view thereof;

FIG. 8 is an opposite side view thereof;

FIG. 9 is a front view thereof; and,

FIG. 10 is a rear view thereof.

The dash-dot lines in the drawings represent the bounds of the claimed design.

The dash-dash lines in the drawings depict portions of an insole that form no part of the claimed design. 

CLAIM The ornamental design for a portion of an insole, as shown and described. 